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Online circular contrast perimetry via a web-application: optimising parameters and establishing a normative
Simon Edward Skalicky1,2, Deus Bigirimana3, Lazar Busija
1Glaucoma Investigation and Research Unit, the Royal Victorian Eye and Ear Hospital, Melbourne, VIC, Australia. seskalicky@gmail.com.
Eye (London, England)
|May 16, 2022
Summary
Online Circular Contrast Perimetry (OCCP) offers accurate vision testing using web-based technology. This method shows comparable results to standard automated perimetry, making it a viable alternative for visual field assessment.
Area of Science:
- Ophthalmology
- Medical Technology
- Visual Science
Background:
- Standard automated perimetry (SAP) is crucial for visual field assessment.
- Developing accessible, reliable perimetry methods is essential for widespread use.
Purpose of the Study:
- To establish a normative database for personal-computer based perimetry.
- To optimize parameters for web-application perimetry using circular contrast targets.
Main Methods:
- Online 24-degree 52-loci perimetry utilized circular flickering contrast targets via a web-application.
- Contrast differentials allowed calculation of relative decibel (rdB) levels, with a staircase system (0-36 rdB) and fixation control.
- The Online Circular Contrast Perimetry (OCCP) test was performed by 101 patients (158 eyes) on personal computers.
Main Results:
- Mean sensitivity decreased by 1.0 relative decibel per decade with age.
- Sensitivity per locus correlated well with standard automated perimetry (SAP), showing good agreement (average difference 4.02 dB).
- The study established a normative database and optimized parameters for the OCCP test.
Conclusions:
- Online Circular Contrast Perimetry (OCCP) is an accurate method for visual field testing.
- OCCP results are comparable to standard automated perimetry (SAP).
- Web-based perimetry offers a promising alternative for accessible and reliable visual field assessment.
